Question

Can you try to explain the inheritance of the character of Free or Attached Ear lobes? Given alongside are pedigree charts of two families A and B. In family A, both parents have free ear lobes and those of family B, have attached ear lobes (Recollect from the previous example what the symbols of circle and square, indicate).
Can you find the answers to the following?
Which trait - free ear lobe or the attached ear lobe is dominant?

Answer 1

● As per the figure, family A has ear lobes that are free and the chart has both hollow and solid symbols while family B has attached ear lobes that shows the solid symbols only.
● This means that free ear lobes are a dominant character while attached ear lobes is a recessive character because only solid symbols denote the recessive character.